Paper piercing device



Patented Aug. 9, 1932 UNITEDA STATE-.s

PATENT OFFICE HENRYA. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR TO WOOD NEWSPAPER MA- CHINERY CORPORATION, F NEW YORK, N. Y., vA. CORPORATION OF VIRGINIA PAPER PIERCING DEVICE Application led December 18, 1928, Serial No. 326,861. Renewed January 19, 1932.

This invention relates to the paper piercing means of a folding couple for paper printing machines and the like.

The principal objects of the invention are to provide means whereby the paper behind the pins when theyY are projected through it will be supported at points near the pins so that there will be less danger than heretofore of the pins mutilating the paper when forced through it and to provide the same in such form that there will be opportunity for a slight movement of the edge of the pin when proj ectino' through the paper.

Other ects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing in which Fig. 1 is a sectional view of part of the two cylinders of a folding couple showing a preferred embodiment of this invention on the cutting cylinder;

Fig. 2 is a similar view showing the invention on the folding cylinder;

Fig. 3 is a similar view showing a modification as applied to the cutting cylinder, and

Fig. 4 is a similar view showing the folding cylinder supplied with the same form of modification.

As is well known the impaling pins of the folding and cutting cylinders of a folding couple are required to extend through several sheets for the purpose of carrying the sheets around when no longer connected with the web in front. These pins are projected out from the surface of the cylinder on which they are mounted into the surface of the other cylinder. For that reason the other cylinder has to be provided with suitable clearance holes so as to permit the pins to pass into it freely and they have to be large enough to permit of the slight necessary movement which the edge of the pin describes due to its projection beyond the pitch line of the cylinder.

This clearance is detrimental to the proper' impaling of the paper by the pins due to the fact that it involves the removal of the surface of the cylinder for a short distance around the pin and thus eliminates the support that the cylinder would otherwise furnish behind the paper and closeI to the pin where it enters the same. When the pins get dull they necessarily deflect the paper out ofrits course and force it back into the rectangular recesses usually employed for that purpose. They have a comparatively wide area in which this action can take place. This displaces the paper on the cylinder and tends to cause an irregular cut to be produced and a ragged edge left around the impaling pins. I greatly reduce the diiiiculties above mentioned in the following way:

In Figs. 1 and 2 the folding cylinder 10 and cutting cylinder 11 are provided with impaling pins 12 and 13, respectively, which work in the ordinary manner. Also the cutting blade 14 operates as usual, but instead of having the clearance holes 15 and 16 rectangular Iy contract them at their outer edges by cuts ting these holes out along inclinedv surfaces 17 and 18 and just leave enough opening for the pin to enter and move. However, any motion -at its extreme point or edge inside will be taken care of by the fact that these clear ance holes widen out underneath and give room for the same. These two iigures show the invention as applied to the cutting cylinder in Fig. 1 and the folding cylinder in Fig. 2. i With this construction the clearance holes are suiiiciently large to permit any movement which the edges of the pinsfdescribe and yet they furnish a support for the paper close to the pins at the point where the paper is impaled.

Another form in which the invention can be carried out is to provide a clearance hole in the usual manner, as shown in Figs. 3 and '4. at 2O and 2l and fill it with resilient material such as soft rubber 22 and 23. Then the impaling pins can enter this soft sub` stance and yet the paper on the outside of the cylinder will be backed up suiiiciently to avoid the deep bending of the paper with the pins inserted, even when they are somewhat dulled. In both cases it will be seen that the pins have plenty o f opportunity for the necessary movement and yet the paper is backed up to "u thecouple, said clearance holes beingof ysa.-

a considerably greater extent than has been the case in previous forms on the market.

Although I have illustrated and described only two forms of the invention I am aware of the fact that other modifications can be made therein by any person skilled in the art without departing from the scope of the. in,- vention as expressed in the claims. Therefore, I do not wish to be limited in this respect but what I doclairn istf n i 1. In a folding couple, the combination with two cylinders forming the couple and impaling pins on one of said cylinders, the other cylinder having clearance holes Afor the impaling pins contracted at their outer ends so as to admit the pin snugly and give. an adequate support to the papery on that cylinder around the pin. f

2. In a folding couple, the combination with the folding cylinders, of impal' pins on one of said cylinders, the other cy inde-r having clearance holes for said impaling pins contracted at the surface of the cylinder to provide support for the paper all around the impaling pins at the points Where they pass beyond the pitch line of the cylinder.

3. In a paper folding couple, cylinders, one of said cylinders having clearance'holes for the impaling pins of the other cylinder of the couple, said clearance holes being of sucient size only at the opening on the surfacey of the cylinder to admit the pin, thereby providing means at the point of entering ofthe said impaling pins for backing up the paper closely around said impali-ng pins, and said holes increasing in size from .the surface of the cylinder inwardly to take care of any motion of the extreme end of the pin inside said hole. 4. In a folding cou-ple, the combination with two cylinders forming the couple, and impalin'g pins on one of said cylinders, the other cylinder having clearance holes for Vthe impaling pins contracted at their outer Jends so as to admit the pin snugly and give an adequate support on the paper on that cylinder Aaround the pin, and said holes increasing in size from the surface of the cylinder inwardly to take care of any motion of the extreme end of the pin inside said hole.

5. In a folding couple, the combination,

with the folding cylinders, of impaling'pins u on one of said cylinders, the other cylinder having clearance holes for said impaling pins contracted at ythe surface of the cylinder to provide support for the papervall around the impaling pins .at the points'where they pass beyond the pitch line of the'cylinder, mdsaid holes increasing in size from Lthe surface of the cylinder inwardly to take careof any motion of the extreme end of the pin inside said 6. In a paper folding couple, cylinders, ,one

of Lsaid cylinders havlng. clearance holes for the lmpahng pins of the other cylinder of 'Iles 

